MISCHIEVOUS Meaning of MISCHIEVOUS in English a. 1.Hurtful, injurious, detrimental, pernicious, destructive, noxious, harmful.2.Vicious, wicked, sinful, malicious.3.Troublesome, vexatious, annoying, naughty. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012